相关疑难解决方法(0)

我花了很多时间在Maven网站上阅读5到30分钟的教程,并且第一次试用了Maven.

我想安装一个Maven插件并用它来开始从Eclipse构建Maven项目.

尽管付出了诚实的努力,但我还是找不到任何Maven插件的综合教程.M2E,这似乎是事实上的标准,在他们的网站上只有破碎(或递归)链接.

我不知道我是否正确安装了插件,或者如何使用它.

有谁知道一个很好的分步指南M2E或任何其他插件？一个附带良好的安装文档,以及对其功能和正确用途的可靠解释？

我看到以下错误:

java.lang.NoClassDefFoundError: com/google/common/util/concurrent/FutureFallback

什么时候cluster.connect()叫:

            String hosts = CassandraClientUtil.getHost();
            String localDC = CassandraClientUtil.getLocalDC();
            Cluster cluster = null;
            if (StringUtils.isNotEmpty(localDC))
            {
                cluster = Cluster.builder().addContactPoints(hosts.split(","))
                        .withCredentials(CassandraCopsComponentLogger.USER_NAME, CassandraCopsComponentLogger.AUTH_CODE)
                        .withQueryOptions(new QueryOptions().setConsistencyLevel(ConsistencyLevel.LOCAL_ONE))
                        .withLoadBalancingPolicy(new TokenAwarePolicy(DCAwareRoundRobinPolicy.builder().withLocalDc(localDC).build())).build();
            }
            else
            {
                cluster = Cluster.builder().addContactPoints(hosts.split(","))
                        .withCredentials(CassandraCopsComponentLogger.USER_NAME, CassandraCopsComponentLogger.AUTH_CODE)
                        .withQueryOptions(new QueryOptions().setConsistencyLevel(ConsistencyLevel.LOCAL_ONE)).build();
            }

            Session session = cluster.connect();
            CassandraCopsComponentLogger.mappingManager = new MappingManager(session);

pom.xml具有以下依赖项:

<dependencies>
        <dependency>
                <groupId>com.google.guava</groupId>
                <artifactId>guava</artifactId>
                <version>16.0.1</version>
        </dependency>
        <dependency>
            <groupId>com.datastax.cassandra</groupId>
            <artifactId>cassandra-driver-core</artifactId>
            <version>2.1.9</version>
        </dependency>
        <dependency>
            <groupId>io.netty</groupId>
            <artifactId>netty</artifactId>
            <version>3.9.0.Final</version>
        </dependency>
        <dependency>
            <groupId>com.codahale.metrics</groupId>
            <artifactId>metrics-core</artifactId>
            <version>3.0.2</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.5</version>
        </dependency>   
        <dependency>
            <groupId>com.datastax.cassandra</groupId>
            <artifactId>cassandra-driver-mapping</artifactId>
            <version>2.1.9</version> …